Venturi unit for a vacuum lifter



FIG. 1 is a front perspective view of a venturi unit for a vacuum lifter showing my new design;

FIG. 2 is a rear perspective view thereof.

The undisclosed bottom view is the same as the top view as shown in FIGS. 1 and 2. 

The ornamental design for a venturi unit for a vacuum lifter, as shown and described. 